.. _example_interfaces_ethernet_traffic_nat_dnat:

####
Dnat
####


.. sidebar:: Contents

  .. contents::
    :depth: 2
    :local:

These scenarios show how to configure DNAT (Destination Network
Address Translation) on OSDx.

.. image:: dnat.svg
  :width: 400

*********
Test DNAT
*********

Description
===========

In this scenario, DUT0 modifies the destination
address of incoming packets generated at the WAN
side. The address is translated to a custom one:
``192.168.100.2``.

Scenario
========

.. include:: dnat/testdnat

.. raw:: html

  <hr>

******************
Test DNAT Redirect
******************

Description
===========

This scenario is similar to the previous one, but
when redirect is specified the destination address
is NATed to the interface IP.

Scenario
========

.. include:: dnat/testdnatredirect

.. raw:: html

  <hr>

*************************
Test DNAT Port Forwarding
*************************

Description
===========

In this scenario, DNAT forwards incoming TCP
traffic destined to a specific port. Requests
arriving at ``10.0.0.2:80`` are translated to
``192.168.100.2:8080``.

Scenario
========

.. include:: dnat/testdnatportforwarding

.. raw:: html

  <hr>

**********************
Test DNAT Address Pool
**********************

Description
===========

In this scenario, DNAT translates the destination
of incoming packets to one address from a pool.
The kernel selects the target address per
connection.

Scenario
========

.. include:: dnat/testdnataddresspool

.. raw:: html

  <hr>

************************
Test DNAT Network Prefix
************************

Description
===========

In this scenario, DNAT translates the destination
using a network prefix. The host part of the
original IP address is kept, but the network part
is mangled using a subnet prefix.

Scenario
========

.. include:: dnat/testdnatnetworkprefix

.. raw:: html

  <hr>